Brown coal drying device and method

Abstract

The invention provides a brown coal drying device. The brown coal drying device comprises an air inlet, an air heater, an air blower, a discharging port, a conveying belt, an air outlet, a cyclone dust collector, a feeding port and a drying oven, wherein the drying oven is in a cylinder shape and is placed vertically, the feeding port is formed in the center of the top of the drying oven, and connecting pipelines on the two sides of the feeding port are connected with the air outlet and used for exhausting drying tail gas; the discharging port is formed in the center of the bottom of the drying oven, and connecting pipelines on the two sides of the discharging port are connected with the air inlet and used for delivering drying air; the conveying belt is spiral, and the included angle between the conveying belt and the horizontal plane is 12 degrees; the air heater and the air blower are sequentially connected to an air inlet pipeline; and the cyclone dust collector is connected to an air outlet pipeline. The invention further discloses a brown coal drying method adopting the drying device. The brown coal drying device and method have the remarkable advantages that the structure is simple, the drying efficiency is high, and the effect is remarkable.

Description

technical field [0001] The invention relates to a lignite drying device and a drying method, belonging to the field of lignite drying, in particular to a device and a method for directly drying lignite by using gas. Background technique [0002] Lignite is a coal with a very low coalification degree, which is between bituminous coal and peat. The internal surface area of ​​lignite is relatively large, and moisture is adsorbed in the gaps and capillary pores on the surface of lignite particles by the intermolecular force between capillary walls and water or hydrogen bonds, which leads to relatively high moisture content in lignite. If it is directly used, it will cost a lot of The energy evaporates the water, and the water takes away a large amount of heat, which makes the heat loss of the smoke exhaust serious, the thermal efficiency is low, and the emission of greenhouse gases is also large, which is not conducive to environmental protection. At the same time, lignite itse...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a more efficient and safer lignite drying device and method for the existing lignite drying technology, such as safety, high energy consumption, and easy reabsorption of water after lignite dehydration.

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